We tested phones based on each of the major smart phone platforms (with the exception of the Palm OS -- Palm chose to not participate in this story with its Centro, the only widely available phone based on that platform).
Apple iPhone 3G
Apple's iPhone has created a new benchmark for smart phone usability that other manufacturers are straining to meet. It's latest 3G phone adds support for high-speed 3G networks, expanded e-mail capabilities and the ability to download new applications from the iTunes App Store.
Dimensions: 4.5 by 2.4 by .5 inchesWeight: 4.7 ounces
Display size: 3.5 inches
Camera: 2 megapixels
Built-in RAM: 8GB
Claimed battery life: Up to five hours (talk time)
Price: $199 ($299 for 16GB) with two-year contract
Network: AT&T
BlackBerry Curve 8310
Research In Motion has positioned the Curve between enterprise-level BlackBerries and smaller consumer-focused phones like the BlackBerry Pearl. The Curve 8310 that we tested is at the low end of the Curve family; there are higher-end models that include features like Wi-Fi.
Dimensions: 4.2 by 2.4 by .6 inchesWeight: 3.9 ounces
Display size: 2.4 inches
Camera: 2 megapixels
Built-in RAM: 64MB
Claimed battery life: Up to four hours (talk time)
Price: Varies; approx. $100 after discounts with two-year contract
Networks: AT&T, Sprint, T-Mobile, Verizon Wireless
HTC Touch Dual
A follow-on to HTC's Touch, this unique phone has gesture-based navigation that, while not as snazzy as that found on Apple's iPhone, is still useful for tasks like browsing and going through your list of e-mail. It also has a sliding front panel that offers access to a snazzy keyboard.
Dimensions: 4.2 by 2.2 by .7 inchesWeight: 4.2 ounces
Display size: 2.6 inches
Camera: 2 megapixels
Built-in RAM: 128MB
Claimed battery life: Up to 410 minutes (talk time)
Price: $499 (unlocked version)
Networks: GSM carriers
Nokia E71
Nokia's most recent smart phone for road warriors eschews touch-screen technology, but it's notably full-featured -- including features such as GPS and a 3.2-megapixel video-capable camera -- and has a delightful keyboard.
Dimensions: 4.5 by 2.2 by .4 inchesWeight: 4.4 ounces
Display size: 2.4 inches
Camera: 3.2 megapixels
Built-in RAM: 110MB
Claimed battery life: Up to 10 hours, 30 minutes (talk time)
Price: $485 (unlocked version)
Networks: GSM carriers


